Trimble Kenai Tablet

We are needing a rugged tablet with 2 DB9 serial ports, as we need one for GPS and one for a sensor. What would our best option be? I thought the Yuma 2 had 2 of these ports, but it looks like the Kenai only has 1. Is this the case? If so, what options would we have to get 2 DB9 serial ports to work?